#define _CRT_SECURE_NO_WARNINGS 1
class Solution {
public:
    int getMaxValue(vector<vector<int>>& grid) {
        if (grid.empty()) return 0;
        int m = grid.size();
        int n = grid[0].size();
        int dp[m + 1][n + 1];
        memset(dp, 0, sizeof(dp));
        dp[0][0] = grid[0][0];
        for (int i = 1; i < n; i++) {
            dp[0][i] = dp[0][i - 1] + grid[0][i];
        }
        for (int i = 1; i < m; i++) {
            dp[i][0] = dp[i - 1][0] + grid[i][0];
        }

        for (int i = 1; i < m; i++) {
            for (int j = 1; j < n; j++) {
                dp[i][j] = (dp[i - 1][j] > dp[i][j - 1] ? dp[i - 1][j] : dp[i][j - 1]) + grid[i][j];

            }
        }
        // cout<<dp[1][0]<<dp[2][0];
        return dp[m - 1][n - 1];
    }
};